<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" type="text/less" href="index.less">
    <script src="../lib/less/less.js"></script>
    <script>less.watch()</script>
    <style>
        .div{
            width: 3rem;
            height: 4rem;
            background: #0AB4F7;
        }
    </style>
</head>
<body>
<div class="div"></div>
</body>
</html>